In a high-pressure pump, an axial thrust balancing system is often applied in order to reduce or balance the axial thrust so as to promote the reliability of bearings supporting the rotor assembly. The balance piston structure, often applied in the rocket turbopump as shown in Fig. 1, is one type of axial thrust balancing system. This balancing system allows the rotor to move in the axial direction and can automatically adjust the unbalanced axial thrust by changing the inlet and outlet orifice clearances of the balance piston. Hence, the rotor behavior in the axial direction is affected by the characteristics of axial thrust generated on the balance piston. The static characteristics of the internal flow and the axial thrust on the balance piston in the rocket turbopump have been studied by theoretical analysis code. In addition, CFD analysis of the static axial thrust in the multistage pumps has been reported. It is possible to use these analysis codes when designing for static axial thrust balancing.
展开▼
